To make room for Cliff Lee's return to the Phillies, the team optioned righthander Michael Schwimer to triple-A Lehigh Valley on Wednesday.
Lee will start against the Mets in the series finale and will be limited to about 80 pitches, pitching coach Rich Dubee said.
Schwimer had an 8.53 ERA in five appearances with the Phillies. He allowed a walk-off single to Washington's Wilson Ramos in the 11th inning Saturday. And New York scored two insurance runs off Schwimer in the ninth inning of Tuesday's loss.
The Phillies have the majors' worst bullpen ERA at 4.95.